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Pribilova M, Skalickova S, Urbankova L, Baholet D, Nevrkla P, Kopec T, Slama P, Horky P. Monitoring of taurine dietary supplementation effect on parameters of Duroc boar ejaculate in summer season. PLoS One 2024; 19:e0288317. [PMID: 38271350 PMCID: PMC10810488 DOI: 10.1371/journal.pone.0288317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2023] [Accepted: 06/24/2023] [Indexed: 01/27/2024] Open
Abstract
The aim of this experiment was to find out whether the taurine supplementation in daily ration had an effect on quantity or quality of Duroc boar ejaculate. The experiment duration was from June to August, when it could assumed the possible occurrence of heat stress. For the study was chosen 12 Duroc boars of approximately the same age and condition. The control group of 6 Duroc boars was fed only by basic diet and the experimental group of 6 Duroc boars was fed by the same basic diet with supplementation of 15 g taurine/boar/day. Ejaculate was collected once a week by hand glowed technique. From ejaculate parameters were monitored volume of ejaculate, sperm concentration, total amount of sperm, morphologically abnormal sperm, taurine concentration and GSH/GSSH concentration. From microscopic analysis, results were statistically significant in motility in June and July (P<0.05). In biochemical results, a significant difference (P<0.05) has been found between the experimental groups in the concentrations of taurine as well as GSH/GSSG in ejaculate which indicates the effect of heat stress on boars during the experimental period.
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Affiliation(s)
- Magdalena Pribilova
- Faculty of AgriSciences, Department of Animal Nutrition and Forage Production, Mendel University in Brno, Brno, Czech Republic
| | - Sylvie Skalickova
- Faculty of AgriSciences, Department of Animal Nutrition and Forage Production, Mendel University in Brno, Brno, Czech Republic
| | - Lenka Urbankova
- Faculty of AgriSciences, Department of Animal Nutrition and Forage Production, Mendel University in Brno, Brno, Czech Republic
| | - Daria Baholet
- Faculty of AgriSciences, Department of Animal Nutrition and Forage Production, Mendel University in Brno, Brno, Czech Republic
| | - Pavel Nevrkla
- Faculty of AgriSciences, Department of Animal Breeding, Mendel University in Brno, Brno, Czech Republic
| | - Tomas Kopec
- Faculty of AgriSciences, Department of Animal Breeding, Mendel University in Brno, Brno, Czech Republic
| | - Petr Slama
- Faculty of AgriSciences, Department of Animal Morphology, Physiology and Genetics, Mendel University in Brno, Brno, Czech Republic
| | - Pavel Horky
- Faculty of AgriSciences, Department of Animal Nutrition and Forage Production, Mendel University in Brno, Brno, Czech Republic
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Adedara IA, Ileola-Gold AV, Adelaja UA, Njoku CA, Ikeji CN, Owoeye O, Farombi EO. Exogenous taurine administration abates reproductive dysfunction in male rats exposed to silver nanoparticles. ENVIRONMENTAL TOXICOLOGY 2024; 39:61-74. [PMID: 37638810 DOI: 10.1002/tox.23945] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 07/18/2023] [Accepted: 08/13/2023] [Indexed: 08/29/2023]
Abstract
The broad contemporary applications of silver nanoparticles (AgNPs) have been associated with various toxicities including reproductive toxicity. Taurine is well acknowledged for its potent pharmacological role in numerous disease models and chemically-mediated toxicity. We investigated the effect of taurine on AgNPs-induced reproductive toxicity in male rats. The animals were intraperitoneally injected with AgNPs (200 μg/kg) alone or co-administered with taurine at 50 and 100 mg/kg for 21 successive days. Exogenous taurine administration significantly abated AgNPs-induced oxidative injury by decreasing the levels of oxidative stress indices while boosting antioxidant enzymes activities and glutathione level in the hypothalamus, testes and epididymis of exposed animals. Taurine administration alleviated AgNPs-induced inflammatory response and caspase-3 activity, an apoptotic biomarker. Moreover, taurine significantly improved spermiogram, reproductive hormones and the marker enzymes of testicular function in AgNPs-treated animals. The ameliorative effect of taurine on pathological lesions induced by AgNPs in the exposed animals was substantiated by histopathological data. This study provides the first mechanistic evidence that taurine supplementation affords therapeutic effect against reproductive dysfunction associated with AgNPs exposure in male rats.
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Affiliation(s)
- Isaac A Adedara
- Drug Metabolism and Toxicology Research Laboratories, Department of Biochemistry, College of Medicine, University of Ibadan, Ibadan, Nigeria
| | - Ayomitan V Ileola-Gold
- Drug Metabolism and Toxicology Research Laboratories, Department of Biochemistry, College of Medicine, University of Ibadan, Ibadan, Nigeria
| | - Uthman A Adelaja
- Drug Metabolism and Toxicology Research Laboratories, Department of Biochemistry, College of Medicine, University of Ibadan, Ibadan, Nigeria
| | - Chiwueze A Njoku
- Drug Metabolism and Toxicology Research Laboratories, Department of Biochemistry, College of Medicine, University of Ibadan, Ibadan, Nigeria
| | - Cynthia N Ikeji
- Drug Metabolism and Toxicology Research Laboratories, Department of Biochemistry, College of Medicine, University of Ibadan, Ibadan, Nigeria
| | - Olatunde Owoeye
- Department of Anatomy, College of Medicine, University of Ibadan, Ibadan, Nigeria
| | - Ebenezer O Farombi
- Drug Metabolism and Toxicology Research Laboratories, Department of Biochemistry, College of Medicine, University of Ibadan, Ibadan, Nigeria
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Li Y, Peng Q, Shang J, Dong W, Wu S, Guo X, Xie Z, Chen C. The role of taurine in male reproduction: Physiology, pathology and toxicology. Front Endocrinol (Lausanne) 2023; 14:1017886. [PMID: 36742382 PMCID: PMC9889556 DOI: 10.3389/fendo.2023.1017886] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Accepted: 01/04/2023] [Indexed: 01/20/2023] Open
Abstract
Taurine, a sulfur-containing amino acid, has a wide range of biological effects, such as bile salt formation, osmotic regulation, oxidative stress inhibition, immunomodulation and neuromodulation. Taurine has been proved to be synthesized and abundant in male reproductive organs. Recently, accumulating data showed that taurine has a potential protective effect on reproductive function of male animals. In physiology, taurine can promote the endocrine function of the hypothalamus-pituitary-testis (HPT) axis, testicular tissue development, spermatogenesis and maturation, delay the aging of testicular structure and function, maintain the homeostasis of the testicular environment, and enhance sexual ability. In pathology, taurine supplement may be beneficial to alleviate pathological damage of male reproductive system, including oxidative damage of sperm preservation in vitro, testicular reperfusion injury and diabetes -induced reproductive complications. In addition, taurine acts as a protective agent against toxic damage to the male reproductive system by exogenous substances (e.g., therapeutic drugs, environmental pollutants, radiation). Related mechanisms include reduced oxidative stress, increased antioxidant capacity, inhibited inflammation and apoptosis, restored the secretory activity of the HPT axis, reduced chromosomal variation, enhanced sperm mitochondrial energy metabolism, cell membrane stabilization effect, etc. Therefore, this article reviewed the protective effect of taurine on male reproductive function and its detailed mechanism, in order to provide reference for further research and clinical application.
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Affiliation(s)
- Yuanyuan Li
- Institute of Nursing and Health, School of Nursing and Health, Henan University, Kaifeng, Henan, China
| | - Qianwen Peng
- Institute of Nursing and Health, School of Nursing and Health, Henan University, Kaifeng, Henan, China
| | - Jia Shang
- Arts Department, School of Kaifeng Culture and Tourism, Henan, Kaifeng, China
| | - Wanglin Dong
- Institute of Nursing and Health, School of Nursing and Health, Henan University, Kaifeng, Henan, China
| | - Sijia Wu
- Institute of Nursing and Health, School of Nursing and Health, Henan University, Kaifeng, Henan, China
| | - Xiajun Guo
- Institute of Nursing and Health, School of Nursing and Health, Henan University, Kaifeng, Henan, China
| | - Zhenxing Xie
- School of Basic Medical Science, Henan University, Henan, Kaifeng, China
- *Correspondence: Zhenxing Xie, ; Chaoran Chen,
| | - Chaoran Chen
- Institute of Nursing and Health, School of Nursing and Health, Henan University, Kaifeng, Henan, China
- *Correspondence: Zhenxing Xie, ; Chaoran Chen,
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Taurine Improves Sperm Mitochondrial Indices, Blunts Oxidative Stress Parameters, and Enhances Steroidogenesis and Kinematics of Sperm in Lead-Exposed Mice. Reprod Sci 2022; 30:1891-1910. [DOI: 10.1007/s43032-022-01140-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Accepted: 11/22/2022] [Indexed: 12/13/2022]
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Wu H, Zhang X, Yang J, Feng T, Chen Y, Feng R, Wang H, Qian Y. OUP accepted manuscript. Hum Reprod 2022; 37:1229-1243. [PMID: 35526154 PMCID: PMC9156853 DOI: 10.1093/humrep/deac089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Revised: 04/02/2022] [Indexed: 11/13/2022] Open
Abstract
STUDY QUESTION Are taurine and its transporter TAUT associated with spermiogenesis and early embryo development? SUMMARY ANSWER Morphologically abnormal spermatozoa increased after local functional interference by intratesticular injection, and taurine depletion significantly reduced the normal embryo numbers in vivo and blastocyst formation rate in vitro. WHAT IS KNOWN ALREADY Taurine is one of the most abundant amino acids in the male reproductive system and it has been demonstrated that taurine can efficiently improve spermatogenic function in rat models of testicular injury. However, limited information is known about the role of taurine and its transporter TAUT in spermatogenesis and early embryo development. STUDY DESIGN, SIZE, DURATION Clinical characteristics from 110 couples who have experienced recurrent pregnancy loss (RPL) were collected from December 2014 to March 2018. According to whether a fetal heartbeat was seen in the previous pregnancy under ultrasonic monitoring, patients with RPL were divided into two groups: an RPL without heartbeat (pregnancy with no fetal heartbeat, ROH) group, and an RPL with heartbeat (one or more pregnancies with fetal heartbeat, RWH) group. Semen samples (21 ROH and 20 RWH) were finally used for metabolomic analysis. Furthermore, semen samples were obtained from 30 patients with teratozoospermia (normal sperm morphology <4%) seeking evaluation for infertility and 25 age-matched control subjects with normal semen quality for western blotting. Animal experiments were performed in CD-1/ICR mice. PARTICIPANTS/MATERIALS, SETTING, METHODS Metabolomics was performed to determine the metabolic changes between the ROH and RWH groups. Sperm proteins from patients with teratozoospermia and healthy controls were extracted for detecting TAUT expression using western blot analysis. Immunofluorescence was used to characterize the localization of TAUT in the testis and ejaculated spermatozoa. Functional analysis in mice was performed by intratesticular injection of siRNAs or antagonist (β-alanine) and 5% β-alanine was provided in drinking water to 3-week-old male mice for 5 weeks with the aim of depleting taurine. Murine epididymal spermatozoa were stained with hematoxylin and eosin for morphological assessment. IVF and mating tests were performed in mice for assessing fertility. MAIN RESULTS AND THE ROLE OF CHANCE Metabolomic analysis demonstrated that the taurine content was lower in spermatozoa but higher in seminal plasma from the ROH than the RWH group. TAUT expression was lower in spermatozoa from patients with teratozoospermia than controls. Immunofluorescence showed that TAUT was localized to the manchette in mouse elongated spermatids functional analysis showed that morphologically abnormal spermatozoa increased after interference, and this defect increased after supplementation with 5% β-alanine but was improved by 5% taurine supplementation. Supplementation with 5% β-alanine significantly reduced the normal embryo number in the mouse uterus as well as blastocyst formation rate in vitro. LARGE SCALE DATA N/A LIMITATIONS, REASONS FOR CAUTION The sample size was low and larger cohorts are needed to confirm the positive effect of taurine on human sperm quality. A comprehensive safety examination should be performed to evaluate whether taurine is a possible treatment for teratozoospermia. Furthermore, the specific molecular mechanism of TAUT involvement in spermiogenesis remains to be clarified. WIDER IMPLICATIONS OF THE FINDINGS The study provides new insights into the role of taurine and its transporter TAUT in male reproduction and embryo development. The results also indicate that TAUT is a promising molecular candidate for the assessment of sperm quality, which may contribute to the diagnosis and treatment for teratozoospermia. STUDY FUNDING/COMPETING INTEREST(S) This work was supported by grants from the National Natural Science Foundation of China (no. 81774075, 31900605, 81971451), Jiangsu Science and Technology Program Grant (BK20190654) and Maternal and child health scientific research of Jiangsu Province (F202121). The authors declare no competing financial interests.
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Affiliation(s)
| | | | - Jihong Yang
- Reproductive Medical Center of Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Ting Feng
- Reproductive Medical Center of Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Yao Chen
- Reproductive Medical Center of Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Ruizhi Feng
- State Key Laboratory of Reproductive Medicine, Second Affiliated Hospital of Nanjing Medical University, Nanjing Medical University, Nanjing, China
| | - Hui Wang
- Correspondence address. Reproductive Medical Center of Second Affiliated Hospital of Nanjing Medical University, 121 Jiangjiayuan Road, Nanjing 210011, China. Tel: +86-025-58771027; E-mail: (Y.Q.); Department of Histology and Embryology, State Key Laboratory of Reproductive Medicine, Nanjing Medical University, 101 Longmian Avenue, Nanjing 211166, China. Tel: +86-025-86869380; E-mail: (H.W.)
| | - Yun Qian
- Correspondence address. Reproductive Medical Center of Second Affiliated Hospital of Nanjing Medical University, 121 Jiangjiayuan Road, Nanjing 210011, China. Tel: +86-025-58771027; E-mail: (Y.Q.); Department of Histology and Embryology, State Key Laboratory of Reproductive Medicine, Nanjing Medical University, 101 Longmian Avenue, Nanjing 211166, China. Tel: +86-025-86869380; E-mail: (H.W.)
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Surai PF, Earle-Payne K, Kidd MT. Taurine as a Natural Antioxidant: From Direct Antioxidant Effects to Protective Action in Various Toxicological Models. Antioxidants (Basel) 2021; 10:1876. [PMID: 34942978 PMCID: PMC8698923 DOI: 10.3390/antiox10121876] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 11/21/2021] [Accepted: 11/23/2021] [Indexed: 12/18/2022] Open
Abstract
Natural antioxidants have received tremendous attention over the last 3 decades. At the same time, the attitude to free radicals is slowly changing, and their signalling role in adaptation to stress has recently received a lot of attention. Among many different antioxidants in the body, taurine (Tau), a sulphur-containing non-proteinogenic β-amino acid, is shown to have a special place as an important natural modulator of the antioxidant defence networks. Indeed, Tau is synthesised in most mammals and birds, and the Tau requirement is met by both synthesis and food/feed supply. From the analysis of recent data, it could be concluded that the direct antioxidant effect of Tau due to scavenging free radicals is limited and could be expected only in a few mammalian/avian tissues (e.g., heart and eye) with comparatively high (>15-20 mM) Tau concentrations. The stabilising effects of Tau on mitochondria, a prime site of free radical formation, are characterised and deserve more attention. Tau deficiency has been shown to compromise the electron transport chain in mitochondria and significantly increase free radical production. It seems likely that by maintaining the optimal Tau status of mitochondria, it is possible to control free radical production. Tau's antioxidant protective action is of great importance in various stress conditions in human life, and is related to commercial animal and poultry production. In various in vitro and in vivo toxicological models, Tau showed AO protective effects. The membrane-stabilizing effects, inhibiting effects on ROS-producing enzymes, as well as the indirect AO effects of Tau via redox balance maintenance associated with the modulation of various transcription factors (e.g., Nrf2 and NF-κB) and vitagenes could also contribute to its protective action in stress conditions, and thus deserve more attention.
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Affiliation(s)
- Peter F. Surai
- Vitagene and Health Research Centre, Bristol BS4 2RS, UK
- Department of Microbiology and Biochemistry, Faculty of Veterinary Medicine, Trakia University, 6000 Stara Zagora, Bulgaria
- Biochemistry and Physiology Department, Saint-Petersburg State University of Veterinary Medicine, 196084 St. Petersburg, Russia
- Department of Animal Nutrition, Faculty of Agricultural and Environmental Sciences, Szent Istvan University, H-2103 Gödöllo, Hungary
| | - Katie Earle-Payne
- NHS Greater Glasgow and Clyde, Renfrewshire Health and Social Care Centre, 10 Ferry Road, Renfrew PA4 8RU, UK;
| | - Michael T. Kidd
- Center of Excellence for Poultry Science, University of Arkansas, Fayetteville, AR 72701, USA;
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Richelle A, Kellman BP, Wenzel AT, Chiang AW, Reagan T, Gutierrez JM, Joshi C, Li S, Liu JK, Masson H, Lee J, Li Z, Heirendt L, Trefois C, Juarez EF, Bath T, Borland D, Mesirov JP, Robasky K, Lewis NE. Model-based assessment of mammalian cell metabolic functionalities using omics data. CELL REPORTS METHODS 2021; 1:100040. [PMID: 34761247 PMCID: PMC8577426 DOI: 10.1016/j.crmeth.2021.100040] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Revised: 04/24/2021] [Accepted: 05/24/2021] [Indexed: 12/30/2022]
Abstract
Omics experiments are ubiquitous in biological studies, leading to a deluge of data. However, it is still challenging to connect changes in these data to changes in cell functions because of complex interdependencies between genes, proteins, and metabolites. Here, we present a framework allowing researchers to infer how metabolic functions change on the basis of omics data. To enable this, we curated and standardized lists of metabolic tasks that mammalian cells can accomplish. Genome-scale metabolic networks were used to define gene sets associated with each metabolic task. We further developed a framework to overlay omics data on these sets and predict pathway usage for each metabolic task. We demonstrated how this approach can be used to quantify metabolic functions of diverse biological samples from the single cell to whole tissues and organs by using multiple transcriptomic datasets. To facilitate its adoption, we integrated the approach into GenePattern (www.genepattern.org-CellFie).
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Affiliation(s)
- Anne Richelle
- Novo Nordisk Foundation Center for Biosustainability at the University of California, San Diego, School of Medicine, La Jolla, CA 92093, USA
- Department of Pediatrics, University of California, San Diego, School of Medicine, La Jolla, CA 92093, USA
| | - Benjamin P. Kellman
- Department of Pediatrics, University of California, San Diego, School of Medicine, La Jolla, CA 92093, USA
- Bioinformatics and Systems Biology Program, University of California, San Diego, La Jolla, CA 92093, USA
| | - Alexander T. Wenzel
- Bioinformatics and Systems Biology Program, University of California, San Diego, La Jolla, CA 92093, USA
- Department of Medicine, University of California, San Diego, School of Medicine, La Jolla, CA 92093, USA
- Moores Cancer Center, University of California, San Diego, La Jolla, CA 92093, USA
| | - Austin W.T. Chiang
- Novo Nordisk Foundation Center for Biosustainability at the University of California, San Diego, School of Medicine, La Jolla, CA 92093, USA
- Department of Pediatrics, University of California, San Diego, School of Medicine, La Jolla, CA 92093, USA
| | - Tyler Reagan
- Department of Pediatrics, University of California, San Diego, School of Medicine, La Jolla, CA 92093, USA
| | - Jahir M. Gutierrez
- Department of Bioengineering, University of California, San Diego, La Jolla, CA 92093, USA
| | - Chintan Joshi
- Novo Nordisk Foundation Center for Biosustainability at the University of California, San Diego, School of Medicine, La Jolla, CA 92093, USA
- Department of Pediatrics, University of California, San Diego, School of Medicine, La Jolla, CA 92093, USA
| | - Shangzhong Li
- Novo Nordisk Foundation Center for Biosustainability at the University of California, San Diego, School of Medicine, La Jolla, CA 92093, USA
- Department of Bioengineering, University of California, San Diego, La Jolla, CA 92093, USA
| | - Joanne K. Liu
- Bioinformatics and Systems Biology Program, University of California, San Diego, La Jolla, CA 92093, USA
| | - Helen Masson
- Novo Nordisk Foundation Center for Biosustainability at the University of California, San Diego, School of Medicine, La Jolla, CA 92093, USA
- Department of Bioengineering, University of California, San Diego, La Jolla, CA 92093, USA
| | - Jooyong Lee
- Novo Nordisk Foundation Center for Biosustainability at the University of California, San Diego, School of Medicine, La Jolla, CA 92093, USA
- Department of Pediatrics, University of California, San Diego, School of Medicine, La Jolla, CA 92093, USA
| | - Zerong Li
- Department of Computer Science and Engineering, University of California, San Diego, La Jolla, CA 92093, USA
| | - Laurent Heirendt
- Luxembourg Centre for Systems Biomedicine, University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Christophe Trefois
- Luxembourg Centre for Systems Biomedicine, University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Edwin F. Juarez
- Department of Medicine, University of California, San Diego, School of Medicine, La Jolla, CA 92093, USA
- Moores Cancer Center, University of California, San Diego, La Jolla, CA 92093, USA
| | - Tyler Bath
- Department of Biomedical Informatics, UC San Diego Health, University of California, San Diego, La Jolla, CA 92093, USA
| | - David Borland
- Renaissance Computing Institute, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27517, USA
| | - Jill P. Mesirov
- Department of Medicine, University of California, San Diego, School of Medicine, La Jolla, CA 92093, USA
- Moores Cancer Center, University of California, San Diego, La Jolla, CA 92093, USA
| | - Kimberly Robasky
- Renaissance Computing Institute, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27517, USA
- Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, NC 27514, USA
- School of Information and Library Science, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
- Carolina Health and Informatics Program, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Nathan E. Lewis
- Novo Nordisk Foundation Center for Biosustainability at the University of California, San Diego, School of Medicine, La Jolla, CA 92093, USA
- Department of Pediatrics, University of California, San Diego, School of Medicine, La Jolla, CA 92093, USA
- Department of Bioengineering, University of California, San Diego, La Jolla, CA 92093, USA
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Oyovwi MO, Nwangwa EK, Ben-Azu B, Edesiri TP, Emojevwe V, Igweh JC. Taurine and coenzyme Q10 synergistically prevent and reverse chlorpromazine-induced psycho-neuroendocrine changes and cataleptic behavior in rats. NAUNYN-SCHMIEDEBERG'S ARCHIVES OF PHARMACOLOGY 2021; 394:717-734. [PMID: 33146779 DOI: 10.1007/s00210-020-02003-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Accepted: 10/15/2020] [Indexed: 12/21/2022]
Abstract
Over the years, mounting evidences have suggested a strong association between chronic chlorpromazine therapy, a popular first-generation antipsychotic drug, and psycho-neuroendocrine changes. In this study, we aim to examine whether treatment with taurine and coenzyme Q10 (COQ-10), compounds with steroidogenic-gonadotropin hormone-enhancing properties, can attenuate the negative impacts of chlorpromazine on steroidogenic, gonadotropin, thyroid and HPA-axis hormones, dopamine levels, catalepsy behavior and neuronal cells of the hypothalamus and pituitary gland in the preventive and reversal treatments in male Wister rats. In the drug treatment alone or preventive protocol, rats received oral administration of saline (10 mL/kg), taurine (150 mg/kg/day), COQ-10 (10 mg/kg/day), or both (taurine + COQ-10/day) alone for 56 consecutive days, or in combination with oral chlorpromazine (30 mg/kg/day) treatment from days 29 to 56. In the reversal protocol, the animals received chlorpromazine or saline for 56 days prior to taurine, COQ-10, or the combination from days 29 to 56. Thereafter, serum prolactin, steroidogenic (testosterone, estrogen, progesterone), gonadotropin (luteinizing hormone, LH, follicle-stimulating hormone, FSH), thyroid (thyrotropin-stimulating hormone, tetraiodothyronine, triiodothyronine) hormones, corticosterone, brain dopamine levels and cataleptic behavior were investigated. The histopathological features of the hypothalamus and pituitary gland were also evaluated. Taurine, COQ-10, or their combination prevented and reversed chlorpromazine-induced hyperprolactinemia, decrease in FSH, LH, testosterone, progesterone and dopamine concentrations, as well as the increase in estrogen levels. Taurine and COQ-10 reduced the changes in thyroid hormones, corticosterone release, histological distortions of the hypothalamus and the pituitary gland of chlorpromazine-treated rats. Taurine and COQ-10 attenuated chlorpromazine-induced catalepsy. The study showed that taurine and COQ-10 prevented and reversed chlorpromazine-induced changes in reproductive, thyroid hormones, dopamine level, corticosterone release, neurodegenerations, and cataleptic behavior in rats.
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Affiliation(s)
- Mega O Oyovwi
- Department of Human Physiology, Faculty of Basic Medical Sciences, Delta State University, Abraka, Delta State, Nigeria
- Department of Basic Medical Science, Achievers University, Owo, Ondo State, Nigeria
| | - Eze K Nwangwa
- Department of Human Physiology, Faculty of Basic Medical Sciences, Delta State University, Abraka, Delta State, Nigeria
| | - Benneth Ben-Azu
- Department of Pharmacology, Faculty of Basic Medical Science, PAMO University of Medical Sciences, Port Harcourt, Rivers State, Nigeria.
| | - Tesi P Edesiri
- Department of Science Laboratory Technology, Delta State Polytechnic, Ogwashi-Uku, Delta State, Nigeria
| | - Victor Emojevwe
- Department of Physiology, Faculty of Baic Medical Sciences, University of Medical Sciences, Ondo, Ondo State, Nigeria
| | - John C Igweh
- Department of Human Physiology, Faculty of Basic Medical Sciences, Delta State University, Abraka, Delta State, Nigeria
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Oyovwi MO, Nwangwa EK, Ben-Azu B, Rotue RA, Edesiri TP, Emojevwe V, Igweh JC, Uruaka CI. Prevention and reversal of chlorpromazine induced testicular dysfunction in rats by synergistic testicle-active flavonoids, taurine and coenzyme-10. Reprod Toxicol 2021; 101:50-62. [PMID: 33548410 DOI: 10.1016/j.reprotox.2021.01.013] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 01/15/2021] [Accepted: 01/27/2021] [Indexed: 12/21/2022]
Abstract
Evidences have shown that alterations in testicular dehydrogenase and ionic-ATPase activities have important implications in spermatogenesis and sperm capacitation, a penultimate biochemical change required for fertilization. Previous studies have revealed that taurine and coenzyme-Q10 (COQ-10), which are synergistic testicle-active bioflavonoids, with proven gonadotropin-enhancing properties reduce testicular damage in rats. Hence, this study investigated the effects of taurine and COQ-10 or their combination alone, and in the preventive and reversal of chlorpromazine-induced inhibition of testicular dehydrogenase enzymes, electrogenic pumps, sperm capacitation and acrosomal-reaction in male Wister rats. In the drug-treatment alone or preventive-protocol, rats received oral treatment of saline (10 mL/kg), taurine (150 mg/kg/day), COQ-10 (10 mg/kg/day) or both alone repeatedly for 56 days, or in combination with chlorpromazine (30 mg/kg/p.o./day) from days 29-56. In the reversal-protocol, the animals received chlorpromazine for 56 days prior to saline, taurine, COQ-10 or the combination from days 29-56. Thereafter, spermatogenesis (sperm count, viability, motility and morphology), testicular dehydrogenase [3beta-hydroxysteroid dehydrogenase (3ß-HSD), 17beta-hydroxysteroid dehydrogenase (17ß-HSD), glucose-6-phosphate dehydrogenase (G6PDH), lactate dehydrogenase-X (LDH-X)], ATPase (Na+/K+, Ca2+, Mg2+, H+) activities, sperm capacitation and acrosomal reaction were evaluated. Taurine and COQ-10 or their combination increased spermatogenesis, testicular 3ß-HSD, 17ß-HSD, G6PDH and LDH-X enzymes of naïve and chlorpromazine-treated rats. Both taurine and COQ-10 increased Na+/K+, Ca2+, Mg2+ and H+-ATPase activities. Also, taurine and COQ-10 or their combination prevented and reversed chlorpromazine-induced inhibition of sperm capacitation and acrosomal-reaction. The study showed that taurine and COQ-10 prevent and reverse chlorpromazine-induced inhibition of spermatogenesis, epididymal sperm capacitation and acrosomal reaction in rats through increased testicular dehydrogenases and electrogenic pump activities.
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Affiliation(s)
- Mega O Oyovwi
- Department of Human Physiology, Faculty of Basic Medical Sciences, College of Medicine, Delta State University, Abraka, Delta State, Nigeria; Department of Basic Medical Sciences, Achievers University, Owo, Ondo State, Nigeria
| | - Eze K Nwangwa
- Department of Human Physiology, Faculty of Basic Medical Sciences, College of Medicine, Delta State University, Abraka, Delta State, Nigeria
| | - Benneth Ben-Azu
- Department of Pharmacology and Therapeutics, Faculty of Basic Medical Sciences, College of Medicine, Delta State University, Abraka, Delta State, Nigeria.
| | - Rume A Rotue
- Department of Physiology, Faculty of Basic Medical Science, College of Medicine, University of Ibadan, Ibadan, Oyo State, Nigeria
| | - Tesi P Edesiri
- Department of Science Laboratory Technology, Delta State Polytechnic, Ogwashi-Uku, Delta State, Nigeria
| | - Victor Emojevwe
- Department of Physiology, University of Medical Sciences, Ondo, Ondo State, Nigeria
| | - John C Igweh
- Department of Human Physiology, Faculty of Basic Medical Sciences, College of Medicine, Delta State University, Abraka, Delta State, Nigeria
| | - Christian I Uruaka
- Department of Pharmacology and Therapeutics, Faculty of Basic Medical Sciences, Rivers State University, Port Harcourt, Rivers State, Nigeria
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10
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Behera A, Sravanthi K, Kumar LK, Vedamurthy GV, Singh D, Onteru SK. Association of taurine with ovarian follicular steroids and postpartum anestrus condition in Murrah buffaloes. Domest Anim Endocrinol 2021; 74:106511. [PMID: 32739763 DOI: 10.1016/j.domaniend.2020.106511] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 06/11/2020] [Accepted: 06/11/2020] [Indexed: 11/30/2022]
Abstract
Taurine is an abundant intracellular beta-amino acid majorly synthesized in the liver and transported through plasma. In mammals, taurine was reported to be involved in various physiological functions, including the enhancement of testosterone levels, the major estradiol precursor. Therefore, we hypothesize that taurine levels are associated with ovarian follicular steroids as well as with a reproductive problem called postpartum anestrus (PPA) in dairy buffaloes. To understand the taurine levels and its possible role in buffalo ovarian follicles, a correlation was established among taurine, estradiol, and testosterone levels in the ovarian follicular fluid. For this purpose, buffalo ovaries were obtained from the slaughterhouse, and follicular fluid samples were collected from small (<4 mm), medium (4-8 mm) and large (>8 mm) follicles. Taurine and steroid levels in the follicular fluid were analyzed by TLC and ELISA, respectively. Taurine and testosterone levels were significantly (P < 0.05) higher in the follicular fluid of small and medium follicles than large follicles, whereas the estradiol levels were significantly (P < 0.001) higher in the large follicles. Thus, taurine showed a positive correlation (r = 0.75) with testosterone and a negative correlation (r = -0.77) with estradiol in buffalo follicular fluid, indicating its possible role in testosterone function during follicular development. Interestingly, significantly (P < 0.001) lower plasma taurine levels in PPA (n = 50) than normal cyclic (n = 50) buffaloes represented its association with PPA. Therefore, our present study recommends the need for future nutrition studies on taurine supplementation to PPA buffaloes.
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Affiliation(s)
- A Behera
- Molecular Endocrinology, Functional Genomics & Systems Biology Laboratory, Animal Biochemistry Division, ICAR-National Dairy Research Institute, Karnal, Haryana 132001, India
| | - K Sravanthi
- Molecular Endocrinology, Functional Genomics & Systems Biology Laboratory, Animal Biochemistry Division, ICAR-National Dairy Research Institute, Karnal, Haryana 132001, India
| | - L K Kumar
- Molecular Endocrinology, Functional Genomics & Systems Biology Laboratory, Animal Biochemistry Division, ICAR-National Dairy Research Institute, Karnal, Haryana 132001, India
| | - G V Vedamurthy
- Molecular Endocrinology, Functional Genomics & Systems Biology Laboratory, Animal Biochemistry Division, ICAR-National Dairy Research Institute, Karnal, Haryana 132001, India
| | - D Singh
- Molecular Endocrinology, Functional Genomics & Systems Biology Laboratory, Animal Biochemistry Division, ICAR-National Dairy Research Institute, Karnal, Haryana 132001, India
| | - S K Onteru
- Molecular Endocrinology, Functional Genomics & Systems Biology Laboratory, Animal Biochemistry Division, ICAR-National Dairy Research Institute, Karnal, Haryana 132001, India.
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11
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Yahyavy S, Valizadeh A, Saki G, Khorsandi L. Taurine induces autophagy and inhibits oxidative stress in mice Leydig cells. JBRA Assist Reprod 2020; 24:250-256. [PMID: 32155016 PMCID: PMC7365531 DOI: 10.5935/1518-0557.20190079] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
OBJECTIVES This study evaluated taurine (TAU) effects on autophagy, apoptosis and oxidative stress in mice Leydig TM3 cells. METHODS We treated TM3 cells with TAU (100 µg/mL) or 3-Methyladenine (3-MA, an autophagy inhibitor) for 24 h, and assessed cell viability, testosterone level, oxidative stress, apoptosis, and autophagy. RESULTS The results showed that TAU markedly increased cell viability, testosterone levels, expression of autophagy-related genes and percentage of LC3-II-positive cells. TAU significantly reduced malondialdehyde (MDA) contents and reactive oxygen species (ROS) levels and increased the activities of SOD (superoxide dismutase) and CAT (Catalase) enzymes in the TM3 cells. TAU in the presence of autophagy inhibitor (3-MA) increased oxidative stress and decreased testosterone levels. CONCLUSION The results showed that autophagy might be involved in TAU-increased testosterone levels in mice Leydig TM3 cells.
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Affiliation(s)
- Shokofeh Yahyavy
- Cellular and Molecular Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.,Department of Anatomical Sciences, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Armita Valizadeh
- Department of Anatomical Sciences, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Ghasem Saki
- Department of Anatomical Sciences, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Layasadat Khorsandi
- Cellular and Molecular Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.,Department of Anatomical Sciences, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
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Cui Y, Han J, Ren J, Chen H, Xu B, Song N, Li H, Liang A, Shen G. Untargeted LC-MS-based metabonomics revealed that aristolochic acid I induces testicular toxicity by inhibiting amino acids metabolism, glucose metabolism, β-oxidation of fatty acids and the TCA cycle in male mice. Toxicol Appl Pharmacol 2019; 373:26-38. [PMID: 31009690 DOI: 10.1016/j.taap.2019.04.014] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Revised: 04/15/2019] [Accepted: 04/17/2019] [Indexed: 01/15/2023]
Abstract
As the main toxic component of aristolochic acid, aristolochic acid I (AAI) is primarily found in Aristolochiaceae plants such as Aristolochia, Aristolochia fangchi and Caulis aristolochiae manshuriensis. AAI has been proven to be carcinogenic, mutagenic and nephrotoxic. Although the role of AAI in testicular toxicity has been reported, its mechanism of action is unknown. Using metabonomics and molecular biology techniques, we tried to identify the differential endogenous metabolites of AAI that may affect the changes in testicular function in mice, map the network of metabolic pathways, and systematically reveal the molecular mechanism of AAI-induced testicular toxicity. We found that AAI inhibited amino acid metabolism in mouse testicular cells, impeded the uptake and oxidative decomposition of fatty acids, prevented normal glucose uptake by testicular cells, which inhibited glycolysis and gluconeogenesis, affected the mitochondrial tricarboxylic acid (TCA) cycle, which impaired the ATP energy supply, decreased the number of spermatogenic cells and sperm in the testes, induced changes in the mitochondrial state of spermatogonial cells, and ultimately led to physiological and pathological changes in the testes. AAI also regulated the testicular physiological activity by regulating the androgen receptor and hormone levels. This study used metabonomics and other methods to elucidate the mechanism of AAI-induced testicular toxicity from a new angle.
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Affiliation(s)
- Yuan Cui
- Chinese Academy of Inspection and Quarantine, Institute of Chemicals Safety, Beijing, China
| | - Jiayin Han
- Key Laboratory of Beijing for Identification and Safety Evaluation of Chinese Medicine, Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, China
| | - Juan Ren
- The Rocket Army General Hospital of the PLA, Pneumology Department, Beijing, China
| | - Huiming Chen
- Chinese Academy of Inspection and Quarantine, Institute of Chemicals Safety, Beijing, China
| | - Baoliang Xu
- Chinese Academy of Inspection and Quarantine, Institute of Chemicals Safety, Beijing, China
| | - Naining Song
- Chinese Academy of Inspection and Quarantine, Institute of Chemicals Safety, Beijing, China
| | - Haishan Li
- Chinese Academy of Inspection and Quarantine, Institute of Chemicals Safety, Beijing, China
| | - Aihua Liang
- Key Laboratory of Beijing for Identification and Safety Evaluation of Chinese Medicine, Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, China.
| | - Guolin Shen
- Chinese Academy of Inspection and Quarantine, Institute of Chemicals Safety, Beijing, China.
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13
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Yang J, Lin S, Zhang Y, Wu G, Yang Q, Lv Q, Hu J. Taurine Improves Sexual Function in Streptozotocin-Induced Diabetic Rats. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 975 Pt 1:307-318. [PMID: 28849465 DOI: 10.1007/978-94-024-1079-2_27] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Previous studies have identified that diabetic erectile dysfunction is associated with androgen and nitric oxide deficiency resulting from hyperglycemia. It has been demonstrated that taurine can stimulate testosterone secretion, increase nitric oxide synthase (NOS) activity and nitric oxide (NO) production, and reduce blood glucose levels in the diabetic animals. Furthermore, recent studies have found that taurine relaxes both the corpus cavernosum and the vasculature. Accordingly, we hypothesized that taurine might exert beneficial effects on erectile function of the diabetic rats. Here, we assessed the effects of taurine on sexual function in streptozotocin (STZ) -induced diabetic male rats. We observed that taurine treatment could markedly increase sexual response and mating ability of STZ-diabetic rats. The serum concentration of gonadotropin-releasing hormone (GnRH), luteinizing hormone (LH), follicle-stimulating hormone (FSH) and testosterone (T) were also significantly increased by taurine administration. Importantly, taurine supplementation notably increased mRNA levels and activity of endothelial NOS (eNOS) and neuronal NOS (nNOS), as well as NO and cGMP content, in the corpus cavernosum of the diabetic rats. In conclusion, the present data indicate that taurine can increase sexual function of STZ-induced diabetic male rats mainly by correcting the diabetes, increasing sexual desire, which is implicated in ameliorating the hypothalamic-pituitary-testicular axis function, and by improving penile erection, which requires increased signaling from the penile endothelial- and neuronal-dependent NO-cGMP pathway.
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Affiliation(s)
- Jiancheng Yang
- Liaoning Provincial Key Laboratory of Zoonosis, College of Animal Science and Veterinary Medicine, Shenyang Agricultural University, Shenyang, Liaoning, 110866, People's Republic of China
| | - Shumei Lin
- Liaoning Provincial Key Laboratory of Zoonosis, College of Animal Science and Veterinary Medicine, Shenyang Agricultural University, Shenyang, Liaoning, 110866, People's Republic of China
| | - Yu Zhang
- Agricultural College of Eastern Liaoning University, Dandong, Liaoning, 118003, People's Republic of China
| | - Gaofeng Wu
- Liaoning Provincial Key Laboratory of Zoonosis, College of Animal Science and Veterinary Medicine, Shenyang Agricultural University, Shenyang, Liaoning, 110866, People's Republic of China
| | - Qunhui Yang
- Liaoning Provincial Key Laboratory of Zoonosis, College of Animal Science and Veterinary Medicine, Shenyang Agricultural University, Shenyang, Liaoning, 110866, People's Republic of China
| | - Qiufeng Lv
- Liaoning Provincial Key Laboratory of Zoonosis, College of Animal Science and Veterinary Medicine, Shenyang Agricultural University, Shenyang, Liaoning, 110866, People's Republic of China
| | - Jianmin Hu
- Liaoning Provincial Key Laboratory of Zoonosis, College of Animal Science and Veterinary Medicine, Shenyang Agricultural University, Shenyang, Liaoning, 110866, People's Republic of China.
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14
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Liu H, Lin S, Lv Q, Yang Q, Wu G, Hu J, Yang J. Taurine Recovers Testicular Steroidogenesis and Spermatogenesis in Streptozotocin-Induced Diabetic Rats. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 975 Pt 2:801-811. [PMID: 28849500 DOI: 10.1007/978-94-024-1079-2_62] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A great deal of investigations have verified that diabetic male reproductive impairment is associated with the dysfunction of testicular steroidogenesis and spermatogenesis resulted from insulin deficiency and hyperglycaemia-induced oxidative stress. It has been identified taurine is profitable for diabetes mellitus and diabetic implications through its insulin-like and islet cells protective activity. Furthermore, our previous studies found that taurine could increase testicular antioxidative ability, stimulate the endocrine activity of hypothalamic-pituitary-testicular axis, elevate testosterone level, raise sperm quality, suppress the deterioration of testicular function. Accordingly, we hypothesized that taurine may have beneficial effects on testicular dysfunction under diabetic mellitus status. Here, we investigated the effects of taurine on testicular steroidogenesis and spermatogenesis in streptozotocin (STZ)-induced type I diabetic rats. We observed that taurine treatment can markedly increase the body and testis weights, testicular SDH and G6PDH activities, decrease the serum fasting glucose concentration of diabetic rats. Serum contents of GnRH, LH, FSH, T, and testicular StAR, 3β-HSD, 17β-HSD mRNA expression levels were also obviously raised by taurine administration, indicating that taurine can improve testicular steroidogenesis in diabetic animals. Finally, we found taurine supplementation effectively elevated the sperm count and motility, reduced sperm abnormality, suggesting that taurine can increase the testicular spermatogenesis function of diabetic rat. In summary, the present data indicated that taurine can rescue the function of testicular steroidogenesis and spermatogenesis in STZ-induced type I diabetic rats possibly by increasing the endocrine activity of hypothalamic-pituitary-testicular axis.
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Affiliation(s)
- Hong Liu
- Liaoning Provincial Key Laboratory of Zoonosis, College of Animal Science and Veterinary Medicine, Shenyang Agricultural University, Shenyang, Liaoning, 110866, People's Republic of China
- Experimental Animal Center, Liaoning University of Traditional Chinese Medicine, Shenyang, Liaoning, 110847, People's Republic of China
| | - Shumei Lin
- Liaoning Provincial Key Laboratory of Zoonosis, College of Animal Science and Veterinary Medicine, Shenyang Agricultural University, Shenyang, Liaoning, 110866, People's Republic of China
| | - Qiufeng Lv
- Liaoning Provincial Key Laboratory of Zoonosis, College of Animal Science and Veterinary Medicine, Shenyang Agricultural University, Shenyang, Liaoning, 110866, People's Republic of China
| | - Qunhui Yang
- Liaoning Provincial Key Laboratory of Zoonosis, College of Animal Science and Veterinary Medicine, Shenyang Agricultural University, Shenyang, Liaoning, 110866, People's Republic of China
| | - Gaofeng Wu
- Liaoning Provincial Key Laboratory of Zoonosis, College of Animal Science and Veterinary Medicine, Shenyang Agricultural University, Shenyang, Liaoning, 110866, People's Republic of China
| | - Jianmin Hu
- Liaoning Provincial Key Laboratory of Zoonosis, College of Animal Science and Veterinary Medicine, Shenyang Agricultural University, Shenyang, Liaoning, 110866, People's Republic of China
| | - Jiancheng Yang
- Liaoning Provincial Key Laboratory of Zoonosis, College of Animal Science and Veterinary Medicine, Shenyang Agricultural University, Shenyang, Liaoning, 110866, People's Republic of China.
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15
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Senescence and declining reproductive potential: Insight into molecular mechanisms through testicular metabolomics. Biochim Biophys Acta Mol Basis Dis 2018; 1864:3388-3396. [DOI: 10.1016/j.bbadis.2018.07.028] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Revised: 07/09/2018] [Accepted: 07/25/2018] [Indexed: 12/28/2022]
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16
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Asano A, Roman HB, Hirschberger LL, Ushiyama A, Nelson JL, Hinchman MM, Stipanuk MH, Travis AJ. Cysteine dioxygenase is essential for mouse sperm osmoadaptation and male fertility. FEBS J 2018; 285:1827-1839. [PMID: 29604178 PMCID: PMC5992081 DOI: 10.1111/febs.14449] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Revised: 02/11/2018] [Accepted: 03/26/2018] [Indexed: 01/17/2023]
Abstract
Sperm entering the epididymis are immotile and cannot respond to stimuli that will enable them to fertilize. The epididymis is a highly complex organ, with multiple histological zones and cell types that together change the composition and functional abilities of sperm through poorly understood mechanisms. Sperm take up taurine during epididymal transit, which may play antioxidant or osmoregulatory roles. Cysteine dioxygenase (CDO) is a critical enzyme for taurine synthesis. A previous study reported that male CDO-/- mice exhibit idiopathic infertility, prompting us to investigate the functions of CDO in male fertility. Immunoblotting and quantitative reverse transcription-polymerase chain reaction analysis of epididymal segments showed that androgen-dependent CDO expression was highest in the caput epididymidis. CDO-/- mouse sperm demonstrated a severe lack of in vitro fertilization ability. Acrosome exocytosis and tyrosine phosphorylation profiles in response to stimuli were normal, suggesting normal functioning of pathways associated with capacitation. CDO-/- sperm had a slight increase in head abnormalities. Taurine and hypotaurine concentrations in CDO-/- sperm decreased in the epididymal intraluminal fluid and sperm cytosol. We found no evidence of antioxidant protection against lipid peroxidation. However, CDO-/- sperm exhibited severe defects in volume regulation, swelling in response to the relatively hypo-osmotic conditions found in the female reproductive tract. Our findings suggest that epididymal CDO plays a key role in post-testicular sperm maturation, enabling sperm to osmoregulate as they transition from the male to the female reproductive tract, and provide new understanding of the compartmentalized functions of the epididymis.
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Affiliation(s)
- Atsushi Asano
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
- The Baker Institute for Animal Health, Cornell University, Ithaca New York 14853
| | - Heather B. Roman
- Department of Nutritional Sciences, Cornell University, Ithaca, New York 14853
| | | | - Ai Ushiyama
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - Jacquelyn L. Nelson
- The Baker Institute for Animal Health, Cornell University, Ithaca New York 14853
| | - Meleana M. Hinchman
- The Baker Institute for Animal Health, Cornell University, Ithaca New York 14853
| | - Martha H. Stipanuk
- Department of Nutritional Sciences, Cornell University, Ithaca, New York 14853
| | - Alexander J. Travis
- The Baker Institute for Animal Health, Cornell University, Ithaca New York 14853
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17
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Zubair M, Ahmad M, Qureshi ZI. Review on arsenic-induced toxicity in male reproductive system and its amelioration. Andrologia 2017; 49. [DOI: 10.1111/and.12791] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/29/2016] [Indexed: 01/14/2023] Open
Affiliation(s)
- M. Zubair
- Department of Theriogenology; Faculty of Veterinary Sciences; University of Agriculture Faisalabad; Faisalabad Pakistan
| | - M. Ahmad
- Department of Theriogenology; Faculty of Veterinary Sciences; University of Agriculture Faisalabad; Faisalabad Pakistan
| | - Z. I. Qureshi
- Department of Theriogenology; Faculty of Veterinary Sciences; University of Agriculture Faisalabad; Faisalabad Pakistan
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18
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Taurine increases testicular function in aged rats by inhibiting oxidative stress and apoptosis. Amino Acids 2015; 47:1549-58. [DOI: 10.1007/s00726-015-1995-0] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2015] [Accepted: 04/22/2015] [Indexed: 01/10/2023]
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19
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Liu Q, Lu Z, Wu H, Zheng L. Chondroprotective Effects of Taurine in Primary Cultures of Human Articular Chondrocytes. TOHOKU J EXP MED 2015; 235:201-13. [DOI: 10.1620/tjem.235.201] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- Qin Liu
- Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University
- The Medical and Scientific Research Center, Guangxi Medical University
| | - Zhenhui Lu
- The Medical and Scientific Research Center, Guangxi Medical University
| | - Huayu Wu
- Department of Cell Biology and Genetics, School of Premedical Sciences, Guangxi Medical University
| | - Li Zheng
- Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University
- The Medical and Scientific Research Center, Guangxi Medical University
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20
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Aly HA, Khafagy RM. Taurine reverses endosulfan-induced oxidative stress and apoptosis in adult rat testis. Food Chem Toxicol 2014; 64:1-9. [DOI: 10.1016/j.fct.2013.11.007] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2013] [Revised: 09/26/2013] [Accepted: 11/11/2013] [Indexed: 12/25/2022]
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21
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Higuchi M, Miura C, Iwai T, Miura T. Trypsin regulates meiotic initiation in the Japanese eel (Anguilla japonica) by promoting the uptake of taurine into germ cells during spermatogenesis. Biol Reprod 2013; 89:58. [PMID: 23926282 DOI: 10.1095/biolreprod.113.109777] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
Meiosis is a unique and critical process in reproduction. Although the key molecular components of meiosis have been identified, the molecular mechanisms regulating the entry into this pathway remain unclear. We previously demonstrated that a progestin in teleost fish, 17alpha, 20beta-dihydroxy-4-pregnen-3-one, is essential for meiotic initiation, and up-regulates taurine synthesis and the production of trypsin in Sertoli cells. In the present study, we found that trypsin promotes the uptake of taurine into germ cells through the up-regulation of solute carrier family 6 (neurotransmitter transporter, taurine), member 6 (Slc6a6) expression. We further found that this up-regulation of the taurine signal is required for Spo11a expression and meiotic initiation.
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Affiliation(s)
- Masato Higuchi
- South-Ehime Fisheries Research Center, Ehime University, Ainan, Ehime, Japan
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Fan JJ, Zhou JL, Li JH, Cui S. Accessory sex glands of male mice have the ability to synthesize taurinevia the cysteine sulfinate decarboxylase pathway. Cell Biol Int 2013; 33:684-9. [DOI: 10.1016/j.cellbi.2009.03.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2008] [Revised: 12/29/2008] [Accepted: 03/20/2009] [Indexed: 11/26/2022]
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Taurine Enhances the Sexual Response and Mating Ability in Aged Male Rats. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2013; 776:347-55. [DOI: 10.1007/978-1-4614-6093-0_32] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Higuchi M, Celino FT, Shimizu-Yamaguchi S, Miura C, Miura T. Taurine plays an important role in the protection of spermatogonia from oxidative stress. Amino Acids 2012; 43:2359-69. [PMID: 22619065 DOI: 10.1007/s00726-012-1316-9] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2011] [Accepted: 04/25/2012] [Indexed: 12/13/2022]
Abstract
It has been demonstrated that taurine has various physiological functions in the body. We demonstrated that taurine is abundant in the serum, liver, muscle and testis of the Japanese eel (Anguilla japonica). In the eel testis, taurine is found mainly in spermatogonia and is weakly expressed also in the Sertoli cells. We have further found in the eel testis that taurine is actively accumulated via the sodium/chloride-dependent taurine transporter (TauT; SLC6A6), which is expressed in germ cells. In our current study, the effects of taurine on the anti-oxidant response were examined. Taurine was found to promote the total superoxide dismutase (SOD) activity in the testis. Moreover, our results indicate that taurine does not affect the mRNA levels of copper-zinc (Cu/Zn) SOD or manganese SOD, but promotes the translation of Cu/Zn SOD. Overall, our present data suggest that taurine may modulate Cu/Zn SOD at the translational level and thereby may play an important role in the protection of germ cells from oxidative stress.
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Affiliation(s)
- Masato Higuchi
- Research Group for Reproductive Physiology, South Ehime Fisheries Research Center, Ehime University, Ainan, Ehime, Japan
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Hernández-Benítez R, Ramos-Mandujano G, Pasantes-Morales H. Taurine stimulates proliferation and promotes neurogenesis of mouse adult cultured neural stem/progenitor cells. Stem Cell Res 2012; 9:24-34. [PMID: 22484511 DOI: 10.1016/j.scr.2012.02.004] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/03/2011] [Revised: 01/26/2012] [Accepted: 02/28/2012] [Indexed: 01/25/2023] Open
Abstract
This study reports an effect of taurine (1-10 mM) increasing markedly (120%) the number of neural precursor cells (NPCs) from adult mouse subventricular zone, cultured as neurospheres. This effect is one of the highest reported for adult neural precursor cells. Taurine-containing cultures showed 73-120% more cells than controls, after 24 and 96 h in culture, respectively. Taurine effect is due to enhanced proliferation as assessed by BrdU incorporation assays. In taurine cultures BrdU incorporation was markedly higher than controls from 1.5 to 48 h, with the maximal difference found at 1.5 h. This effect of taurine reproduced at every passage with the same window time. Taurine effects are not mimicked by glycine, alanine or GABA. Clonal efficiency values of 3.6% for taurine cultures and 1.3% for control cultures suggest a taurine influence on both, progenitor and stem cells. Upon differentiation, the proportion of neurons in control and taurine cultures was 3.1% (±0.5) and 10.2% (±0.8), respectively. These results are relevant for taurine implication in brain development as well as in adult neurogenesis. Possible mechanisms underlying taurine effects on cell proliferation are discussed.
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Affiliation(s)
- Reyna Hernández-Benítez
- División de Neurociencias, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico City, Mexico
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Higuchi M, Celino FT, Tamai A, Miura C, Miura T. The synthesis and role of taurine in the Japanese eel testis. Amino Acids 2011; 43:773-81. [PMID: 22045384 DOI: 10.1007/s00726-011-1128-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2011] [Accepted: 10/15/2011] [Indexed: 10/16/2022]
Abstract
In teleost fish, the progestin 17α, 20β-dihydroxy-4-pregnen-3-one (DHP) is an essential component of the spermatogenesis pathway. In a series of investigations on the mechanisms underlying progestin-stimulated spermatogenesis, we have found that DHP up-regulates the expression of cysteine dioxygenase1 (CDO1) in the Japanese eel testis. CDO1 is one of the enzymes involved in the taurine biosynthesis pathway. To evaluate whether taurine is synthesized in the eel testis, cysteine sulfinate decarboxylase (CSD), another enzyme involved in taurine synthesis, was isolated from this species. RT-PCR and in vitro eel testicular culture revealed that although CSD was also expressed in eel testis, neither DHP nor other sex steroids affect CSD mRNA expression in a similar manner to CDO1. Using an in vitro eel testicular culture system, we further investigated the effects of DHP on taurine synthesis in the eel testis. HPLC analysis showed that DHP treatment significantly increases the taurine levels in the eel testis. These results suggest that DHP promotes taurine synthesis via the up-regulation of CDO1 mRNA expression during eel spermatogenesis. Furthermore, we observed from our analysis that although taurine does not induce complete spermatogenesis, it promotes spermatogonial DNA synthesis and the expression of Spo11, a meiosis-specific marker. These data thus suggest that taurine augments the effects of sex steroids in the promotion of spermatogonial proliferation and/or meiosis and hence that taurine plays important roles in spermatogenesis.
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Affiliation(s)
- Masato Higuchi
- Research Group for Reproductive Physiology, South Ehime Fisheries Research Center, Ehime University, Ainan, Ehime, Japan
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Yang J, Wu G, Feng Y, Lv Q, Lin S, Hu J. Effects of taurine on male reproduction in rats of different ages. J Biomed Sci 2010; 17 Suppl 1:S9. [PMID: 20804629 PMCID: PMC2994374 DOI: 10.1186/1423-0127-17-s1-s9] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND It has been demonstrated that taurine is one of the most abundant free amino acids in the male reproductive system, and can be biosynthesized by male reproductive organs. But the effect of taurine on male reproduction is poorly understood. METHODS Taurine and beta-alanine (taurine transport inhibitor) were offered in water to male rats of different ages. The effects of taurine on reproductive hormones, testis marker enzymes, antioxidative ability and sperm quality were investigated. RESULTS The levels of T and LH were obviously increased by taurine supplementation in rats of different ages, and the level of E was also significantly elevated in baby rats. The levels of SOD, ACP, SDH and NOS were obviously increased by taurine administration in adult rats, but the levels of AKP, AST, ALT and NO were significantly decreased. The levels of SOD, ACP, LDH, SDH, NOS, NO and GSH were significantly elevated by taurine administration in aged rats, but the levels of AST and ALT were significantly decreased. The motility of spermatozoa was obviously increased by taurine supplement in adult rats. The numbers and motility of spermatozoa, the rate of live spermatozoa were significantly increased by taurine supplement in aged rats. CONCLUSIONS The present study demonstrated that a taurine supplement could stimulate the secretion of LH and T, increase the levels of testicular marker enzymes, elevate testicular antioxidation and improve sperm quality. The results imply that taurine plays important roles in male reproduction especially in aged animals.
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Affiliation(s)
- Jiancheng Yang
- College of Animal Science & Veterinary Medicine, Shenyang Agricultural University, Shenyang, 110866, P.R. China
| | - Gaofeng Wu
- College of Animal Science & Veterinary Medicine, Shenyang Agricultural University, Shenyang, 110866, P.R. China
| | - Ying Feng
- College of Animal Science & Veterinary Medicine, Shenyang Agricultural University, Shenyang, 110866, P.R. China
| | - Qiufeng Lv
- College of Animal Science & Veterinary Medicine, Shenyang Agricultural University, Shenyang, 110866, P.R. China
| | - Shumei Lin
- College of Animal Science & Veterinary Medicine, Shenyang Agricultural University, Shenyang, 110866, P.R. China
| | - Jianmin Hu
- College of Animal Science & Veterinary Medicine, Shenyang Agricultural University, Shenyang, 110866, P.R. China
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Jana K, Samanta PK, De DK. Nicotine Diminishes Testicular Gametogenesis, Steroidogenesis, and Steroidogenic Acute Regulatory Protein Expression in Adult Albino Rats: Possible Influence on Pituitary Gonadotropins and Alteration of Testicular Antioxidant Status. Toxicol Sci 2010; 116:647-59. [DOI: 10.1093/toxsci/kfq149] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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CSD mRNA expression in rat testis and the effect of taurine on testosterone secretion. Amino Acids 2009; 39:155-60. [DOI: 10.1007/s00726-009-0388-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2009] [Accepted: 11/03/2009] [Indexed: 01/18/2023]
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30
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Taurine protects rat testes against NaAsO2-induced oxidative stress and apoptosis via mitochondrial dependent and independent pathways. Toxicol Lett 2009; 187:201-10. [PMID: 19429265 DOI: 10.1016/j.toxlet.2009.03.001] [Citation(s) in RCA: 161] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2009] [Revised: 03/03/2009] [Accepted: 03/03/2009] [Indexed: 11/23/2022]
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Wei SM, Yan ZZ, Zhou J. Beneficial effect of taurine on testicular ischemia-reperfusion injury in rats. Urology 2008; 70:1237-42. [PMID: 18158068 DOI: 10.1016/j.urology.2007.09.030] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2007] [Revised: 08/15/2007] [Accepted: 09/16/2007] [Indexed: 11/18/2022]
Abstract
OBJECTIVES To evaluate the effect of taurine, a potent antioxidant, on testicular ischemia-reperfusion injury due to excess reactive oxygen species produced by neutrophils after testicular torsion-detorsion. METHODS A total of 60 adult male Sprague-Dawley rats were randomly divided into three groups, each containing 20 rats. The control group underwent a sham operation of the left testis. In the torsion-detorsion group, the left testis was rotated 720 degrees counterclockwise for 2 hours. The treatment group underwent the same surgical procedure as the torsion-detorsion group, but taurine was administered intravenously at repair of the testicular torsion. One half of the rats in each group underwent orchiectomy 4 hours after detorsion for measurement of myeloperoxidase activity, an indicator of neutrophil accumulation in the testis, and for evaluation of tissue malondialdehyde, an indicator of intratesticular reactive oxygen species content. The remainder were killed at orchiectomy 3 months after detorsion for analysis of testicular spermatogenesis. RESULTS Unilateral testicular torsion-detorsion caused a significant increase in myeloperoxidase activity and the malondialdehyde level and a significant decrease in testicular spermatogenesis in the ipsilateral testes. The decrease in ipsilateral testicular spermatogenesis involved a reduction in testicular weight, mean seminiferous tubular diameter, number of germ cell layers, and mean testicular biopsy score. The rats treated with taurine had a significant decrease in myeloperoxidase activity and malondialdehyde level and a significant increase in testicular spermatogenesis in the ipsilateral testes compared with the torsion-detorsion group. CONCLUSIONS The results of our study have shown that the administration of taurine exerts a beneficial effect on testicular ischemia-reperfusion injury. This effect might be partly the result of a reduction in reactive oxygen species generation by diminishing neutrophil recruitment to the testis.
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Affiliation(s)
- Si-Ming Wei
- Department of Urology, Third Affiliated Hospital of Hangzhou City, Zhejiang Chinese Medical University, Hangzhou City, Zhejiang Province, China.
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Li JH, Ling YQ, Fan JJ, Zhang XP, Cui S. Expression of cysteine sulfinate decarboxylase (CSD) in male reproductive organs of mice. Histochem Cell Biol 2005; 125:607-13. [PMID: 16252094 DOI: 10.1007/s00418-005-0095-8] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/29/2005] [Indexed: 11/25/2022]
Abstract
Cysteine sulfinate decarboxylase (CSD) is the rate-limiting biosynthetic enzyme of taurine, but it is still controversial whether the male reproductive organs have the function to synthesize taurine through CSD pathway. The present study was thus undertaken to detect CSD expression in male mouse reproductive organs by RT-PCR, Western blot and immunohistochemistry. The results show that CSD is expressed both at the mRNA and protein levels in the testis, epididymis and ductus deferens. The relative levels of both CSD mRNA and protein increase from the testis to the epididymis and to the ductus deferens. Immunohistochemical results demonstrate that the main cell types containing CSD are Leydig cells of testis, epithelial cells and some stromal cells throughout the efferent ducts, epididymis and ductus deferens. These results suggest that male genital organs have the function to produce taurine through the CSD pathway, although quantifying the relation of CSD expression to taurine synthesis and the exact functions of taurine in male genital organs still need to be elucidated in future studies.
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Affiliation(s)
- Jian Hua Li
- Department of Animal Physiology, College of Biological Sciences, China Agricultural University, Beijing, 100094, P. R. China
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Ma N, Ding X, Miwa T, Semba R. Immunohistochemical localiztion of taurine in the rat stomach. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2004; 526:229-36. [PMID: 12908605 DOI: 10.1007/978-1-4615-0077-3_29] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Ning Ma
- Department of Anatomy, Mie University School of Medicine, Tsu 514-0001, Mie, Japan
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Xu YX, Wagenfeld A, Yeung CH, Lehnert W, Cooper TG. Expression and location of taurine transporters and channels in the epididymis of infertile c-ros receptor tyrosine kinase-deficient and fertile heterozygous mice. Mol Reprod Dev 2003; 64:144-51. [PMID: 12506346 DOI: 10.1002/mrd.10250] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Defective sperm volume regulation causes infertility in c-ros knockout (KO) mice lacking the initial segment of the epididymis (IS). As taurine is in high concentration in the male tract and acts as an organic osmolyte in somatic cells, the taurine transporter (TauT), taurine content and taurine channel phospholemman (PLM) were examined in the epididymides of these and fertile heterozygous (+/-) mice. TauT and PLM genes were demonstrated by RT-PCR in the caput of +/- and c-ros knockout males. Northern blots revealed one transcript of TauT (8 kb) in all regions with different expression between segments (cauda > corpus > IS > caput) and no differences in expression between genotypes. Western blotting revealed three translation products of TauT in all epididymal regions (107, 69, 49 kDa) with higher expression of the 69 kDa and 49 isoforms in the -/- than +/- caput. Immunohistochemical staining revealed staining of principal cells and stronger staining of apical and clear cells in all epididymal regions. The expression of the PLM transcript (0.75 kb: cauda = corpus > caput > IS) was upregulated in the proximal caput and cauda of KO mice. Tissue taurine was higher in the cauda >corpus>IS congruent with caput in fertile males and significantly higher in the proximal caput of the KO male. By contrast, taurine concentrations in cauda epididymidal fluid and content per 10(6) sperm did not differ between genotypes. TauT and PLM may be involved in taurine regulation in the normal epididymis and the proximal accumulation of taurine in the infertile males.
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Affiliation(s)
- Y-X Xu
- Institute of Reproductive Medicine of the University, Münster, Germany
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Lobo MVT, Alonso FJM, Arenas MI, Caso E, Fraile B, del Río RM. Ultrastructural staining with sodium metaperiodate and sodium borohydride. J Histochem Cytochem 2002; 50:11-9. [PMID: 11748290 DOI: 10.1177/002215540205000102] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
This article describes new ultrastructural staining methods for osmicated tissues based on the incubation of sections with sodium metaperiodate and sodium borohydride solutions before uranyl/lead staining. Sections incubated with sodium metaperiodate and sodium borohydride, treated with Triton X-100, and stained with ethanolic uranyl acetate/lead citrate showed a good contrast for the nucleolus and the interchromatin region, whereas the chromatin masses were bleached. Chromatin bleaching depended on the incubation with these oxidizing (metaperiodate) and reducing (borohydride) agents. Other factors that influenced the staining of the chromatin masses were the en bloc staining with uranyl acetate, the incubation of sections with Triton X-100, and the staining with aqueous or ethanolic uranyl acetate. The combination of these factors on sections treated with metaperiodate/borohydride provided a different appearance to the chromatin, from bleached to highly contrasted. Most cytoplasmic organelles showed a similar appearance with these procedures than with conventional uranyl/lead staining. However, when sections were incubated with metaperiodate/borohydride and Triton X-100 before uranyl/lead staining, the collagen fibers, and the glycocalix and zymogen granules of pancreatic acinar cells, appeared bleached. The possible combination of these methods with the immunolocalization of the amino acid taurine was also analyzed. (J Histochem Cytochem 50:11-19, 2002)
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Affiliation(s)
- Maria V T Lobo
- Servicio de Neurobiología, Departamento de Investigación, Hospital Ramón y Cajal, Universidad de Alcala, Alcala de Henares, Madrid, Spain
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Bustamante J, Lobo MV, Alonso FJ, Mukala NT, Giné E, Solís JM, Tamarit-Rodriguez J, Martín Del Río R. An osmotic-sensitive taurine pool is localized in rat pancreatic islet cells containing glucagon and somatostatin. Am J Physiol Endocrinol Metab 2001; 281:E1275-85. [PMID: 11701444 DOI: 10.1152/ajpendo.2001.281.6.e1275] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Previous reports have dealt with the hypoglycemic properties of taurine and its effects on insulin secretion by adult and fetal isolated islets. We have studied the presence and cellular distribution of taurine in rat islets, the conditions to evoke its release, and its possible modulatory action on insulin secretion. We localized taurine by techniques of double immunolabeling in most glucagon-positive cells and in some somatostatin-positive cells, whereas insulin-positive cells were not labeled with the taurine antibody. Although high-glucose stimulation did not evoke any taurine release, a hyposmotic solution (17% osmolarity reduction) induced a specific phasic release of taurine and GABA (34 and 52% increase on their basal release rate). On the other hand, taurine (10 mmol/l) application slightly reduced the second phase of insulin secretion induced by glucose stimulation. In conclusion, taurine is highly concentrated in glucagon-containing cells of the islet periphery. It is not liberated by glucose stimulation but is strongly released under hyposmotic conditions. All of these data suggest that taurine plays an osmoregulatory role in alpha-cells.
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Affiliation(s)
- J Bustamante
- Department of Physiology, Faculty of Medicine, Universidad Complutense, 28040 Madrid, Spain.
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Lobo MV, Huerta L, Ruiz-Velasco N, Teixeiro E, de la Cueva P, Celdrán A, Martín-Hidalgo A, Vega MA, Bragado R. Localization of the lipid receptors CD36 and CLA-1/SR-BI in the human gastrointestinal tract: towards the identification of receptors mediating the intestinal absorption of dietary lipids. J Histochem Cytochem 2001; 49:1253-60. [PMID: 11561009 DOI: 10.1177/002215540104901007] [Citation(s) in RCA: 110] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
The scavenger receptors CLA-1/SR-BI and CD36 interact with native and modified lipoproteins and with some anionic phospholipids. In addition, CD36 binds/transports long-chain free fatty acids. Recent biochemical evidences indicates that the rabbit CLA-1/SR-BI receptor can be detected in enterocytes, and previous studies showed the presence of mRNA for both CLA-1/SR-BI and CD36 in some segments of the intestinal tract. These findings prompted us to study their respective localization and distribution from the human stomach to the colorectal segments, using immunohistochemical methods. Their expression in the colorectal carcinoma-derived cell line Caco-2 was analyzed by Northern blotting. In the human intestinal tract, CLA-1/SR-BI was found in the brush-border membrane of enterocytes from the duodenum to the rectum. However, CD36 was found only in the duodenal and jejunal epithelium, whereas enterocytes from other intestinal segments were not stained. In the duodenum and jejunum, CD36 co-localized with CLA-1/SR-BI in the apical membrane of enterocytes. The gastric epithelium was immunonegative for both glycoproteins. We also found that CLA-1/SR-BI mRNA was expressed in Caco-2 cells and that its expression levels increased concomitantly with their differentiation. In contrast, the CD36 transcript was not found in this colon cell line, in agreement with the absence of this protein in colon epithelium. The specific localization of CLA-1/SR-BI and CD36 along the human gastrointestinal tract and their ability to interact with a large variety of lipids strongly support a physiological role for them in absorption of dietary lipids.
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Affiliation(s)
- M V Lobo
- Departamento de Investigación, Hospital Ramón y Cajal, Madrid, Spain
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Lobo MV, Alonso FJ, Latorre A, del Río RM. Immunohistochemical localization of taurine in the rat ovary, oviduct, and uterus. J Histochem Cytochem 2001; 49:1133-42. [PMID: 11511682 DOI: 10.1177/002215540104900907] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The distribution of the amino acid taurine in the female reproductive organs has not been previously analyzed in detail. The aim of this study was to determine taurine localization in the rat ovary, oviduct, and uterus by immunohistochemical methods. Taurine was localized in the ovarian surface epithelium. The granulosa cells and oocytes of primordial follicles were immunonegative. In primary and antral follicles, taurine was found mainly in theca cells and oocytes, whereas the zona pellucida, antrum, and most granulosa cells were unstained. However, taurine immunoreactivity in theca cells and oocytes decreased during follicular atresia. During corpora lutea development, the number of immunopositive theca lutein cells increased as these cells invaded the granulosa-derived region. Therefore, most luteal cells from the mature corpora lutea were stained. In the regressing corpora lutea, however, taurine staining in luteal cells decreased. In the fimbriae, infundibulum, and uterotubal junction, taurine was localized in most epithelial cells. In the ampullar and isthmic segments, taurine was found in the cilia of most ciliated cells and in the apical cytoplasm of some non-ciliated cells. In the uterus, most epithelial cells were immunopositive during diestrus and metestrus, whereas most of them were immunonegative during estrus and proestrus. Moreover, taurine immunoreactivity in the oviduct and uterus decreased with pregnancy. (J Histochem Cytochem 49:1133-1142, 2001)
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Affiliation(s)
- M V Lobo
- Servicio de Neurobiología, Departamento de Investigación, Hospital Ramón y Cajal, Universidad de Alcalá, Alcalá de Henares, 28034 Madrid, Spain.
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